Generally, the working voltage of lithium batteries is 3.7V and the termination voltage is 3.2V; The working voltage of lithium iron phosphate batteries is 3.26V and the termination voltage is 2.5V.
Lithium battery is a primary battery which uses lithium metal or lithium alloy as the negative electrode material and uses non-aqueous electrolyte solution. It is similar to rechargeable lithium batteries. Ion batteries and lithium-ion batteries are different. The inventor of lithium batteries is Edison. Since the chemical properties of lithium metal are very active, the processing, storage and use of lithium metal are subject to very high environmental requirements. Therefore, lithium batteries have not been used for a long time.
Lithium batteries are generally divided into two categoriesegories:
Lithium metal batteries: Lithium metal batteries generally use manganese dioxide as cathode material, lithium metal or other materials. A battery that uses a metal alloy as the negative electrode material and uses a non-aqueous electrolyte solution.
Lithium ion battery: Lithium ion battery generally uses lithium alloy metal oxide as the positive electrode material, graphite as the negative electrode material, and non-aqueous electrolyte.
Causes of lithium battery explosion:
1. Great internal polarization.
2. The pole piece absorbs water and reacts with the electrolyte.
3. The quality and performance issues of the electrolyte itself.
4. When injecting liquid, the amount of liquid injected does not meet the process requirements.
5. During the assembly process, the performance ofLaser welding sealing performance is poor, air leakage occurs, and air leakage is not measured when measuring air leakage.
6. Pole piece dust and dust can easily cause micro short circuits.
7. The positive and negative electrode sheets are thicker than the process array and difficult to insert into the shell.
8. Liquid injection sealing problem, poor sealing performance of steel balls leads to air swelling.
9. The incoming shell material has a thicker shell wall, and shell deformation affects the thickness.
4.2 V is the highest voltage limit for battery charging.
The charging voltage of 18650 lithium battery is 3.7V, the charging cutoff voltage is 4.2V, and the discharge cutoff voltage is 3.0V. Therefore, when the circuit voltage opensrt of the battery is below 3.6V, it should be able to charge. It is best to use 4.2V constant voltage charging mode.
High safety performance 18650 lithium battery has high safety performance, does not explode and burn not ; non-toxic, non-polluting and has passed RoHS brand certification are integrated in one go, the number; cycles is more than 500 times; and it has good high temperature resistance, the discharge efficiency reaches 100% under 65 degree conditions. To prevent battery short circuit, the positive and negative electrodes of the 18650 lithium battery are separated.
Detailed InformationWhat should be noted when using lithium batteries is that the battery enters a dormant state after being left for a period of time. At this point, the capacity is lower than the normal value and usage time. Eastalso shortened. However, lithium batteries are easy to activate. After 3-5 normal charge and discharge cycles, the battery can be activated and restored to its normal capacity.
Due to the characteristics of the lithium battery itself, it has almost no memory effect. Therefore the userThe new mobile phone lithium battery does not require any special methods or equipment during the activation process. Not only is this true in theory, but from my own practice, the "natural activation" method of loading using standard methods from the beginning is best.
Baidu-18650 Encyclopedia Lithium Battery